Quarter-second timing clock



4 Sheens-Sheet 1 (Model) J. KARE.

QUARTER-SECOND TIMING CLOCK.

No. 271,078. Patented Jan.23,1883.

M (Model) 4Sheets-Sheet2 J. KARR.

QUARTER-SECOND TIMING CLOCK. No. 271,078. Patented Jan. 23, 1883.

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J. KARE.

QUARTER-SECOND TIMING CLOCK.

No. 271,078. Patented Jan.23,1883.

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(ModeL) 4 SheetsSheet 4.

' J. KARR.

QUARTER-SECOND TIMINGCLOGK.

No. 271,078. Patented Ja..n.23,1883.

N. PETERS. PMIo-Ldhugnphcr, Washington. D. c.

UNITED STATES PATENT OFFICE,

JACOB KARE, OF WASHINGTON, DISTRICT OF COLUMBIA.

QUARTER-SECOND TIMING-CLOCK.

SPECIFICATION forming part of Letters Patent No. 271,078, dated January 3, 1883.

Application filed August 28, 1882.

in Time Mechanism; and I do hereby declare that the following is a full, clear, and exact description thereof,'reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 is a front elevation of my clock as arranged for use. Fig. 2 is a perspective view of the movement separated from its case. Fig. 3 is an enlarged front elevation of the same. Fig. 4 is a perspective view of the escapewheels and stop mechanism separated from the train. Fig. 5 is an elevation of the front side of said movement, and shows the mechanism for setting the independent seconds and minutes handsaud for arresting the movements of the latter. Fig. 6 is a side elevation of the same, and shows the ditferent positions occupied by the mechanism for setting the seconds-hand. Fig. 7 is a like view of said movement, and shows the diflerentpositions of the mechanism employed for communicating motion to and arresting motion of the independent minutes-hand. Fig. 8 is a perspective view of the center arbor and its attachments separated from each other. Fig. 9 is a like view of the same combined, and Fig. 10 is a central onds may be accurately measured; and to this end it consists principally in a time-piece 4 provided at the center of its dial with a constant and an independent sweep seconds-hand, and an independent minutes -hand, and at points above and below such center has an independent quarter-seconds hand and constant minutes and hours hands, substantially as and for the purpose hereinafter shown.

It consists, further, in a timepiece provided with a sweep seconds-hand and a quarter-seconds hand, which are driven through a special train, which is connected with and driven by the regular train by means of a maintainingspring, whereby said hands may be turned in (Model.)

either direction or stopped without interference with said regular train, substantially as and for the purpose hereinafter set forth.

It consists, further, in the means employed for arresting the motion of the quarter-seconds hand, substantially as and for the purpose hereinafter shown and described.

It consists, further, in the means employed for arresting the motion of the independent minutes-hand, substantially as and for the purpose hereinafter specified.

It consists, further, in the means employed for setting the independent sweep secondshand and the quarter-seconds hand, substantially as and for the purpose hereinafter shown.

It consists, finally, in the means employed for setting the independent minutes-hand, substantially as and for the purpose hereinafter set forth.

In the annexed drawings, A represents the front plate and B, the back plate, of mymovement, which plates are connected together at their corners and held in relative parallel positions by any usual means.

Journaled at one side of the frame isthe first arbor, C, which is provided with a going-barrel, c, that has any usual construction. Below, at the transverse center of said frame, is the second arbor, D, thatreceives motion from said going-barrel, which motion is imparted to a third arbor, E, that is located above and to the left ofsaid arbor D. A fourth arbor, F, 10-

cated atthe centerof said frame, receives motion from said arbor E, and imparts the same to an escape-wheel arbor, G, which is located above and to the left of the former. A palletarbor, H, and balance-wheel arbor I complete the arbors of the train, which arbors are provided with the usual wheels, pinions, &c., and operate in the ordinary manner. The arbor I) is connected with its wheel and pinion by friction mechanism, which permits it to be rotated independently for the purpose'ot' setting aminutes-hand,K,and an hours-hand,L,which are driven in the usual manner by the projecting end of said arbor, with the aid of ordinary dial-wheels M and N, and are arranged toindicate upon a properly-divided circle, 0, near the lower side of a-dial, 0, minutes and hours.

The center arbor, F, projects beyond the front I plate, A, and receives a sweep seconds-hand, P, which is adapted to indicate, by a properlydivided circle, 0, upon the outer portion of I the hub of said spider, project between two of the dial 0, seconds and quarter-seconds. Said arbor is connected with its wheel and pinion by friction, and may be independently rotated for the purpose otsetting said hand. Between the plate A and hand P the projecting end of the arbor F passes through a bridge, Q, that is provided with a sleeve, upon which isjournaled a wheel, R, that meshes with and receives motion from a pinion, S, which is secured to and revolves with the projecting end of the arbor E. Said pinion and wheel have such relative proportions as to cause the latter to revolve once each hour and to cause arelatively-short hand,T,secured thereon ,in indicate minutes upon a suitably-divided inner circle, 0 upon the dial 0. Said arbor E is also capable of rotation independent of its usual wheel and pinion, so as to enable said hand to be set when desired. This arrangement of the train gives to the clock the usual minutes and hours hands, and, in addition thereto, an extra minutes-hand and a sweep seconds-hand, each or" which is capable of being set without reference to the other.

Between the bridge Q and plate A, above the arbor F, is journaled an arbor, U, upon which is a pinion, a, and a four-armed pallet, a, that engages with the teeth c of an extra escape-wheel, V, of ordinary form, but having just twice the number of teeth of the regular escape-wheel, which escape-wheel V is secured upon the projecting end of the arbor G.

Motion is-impartcd to the arbor Uby means of a wheel, WV, which is secured to an arbor, 7.0, that is jonrnaled between the plate A and bridge Q, and is provided with a pinion, 'LC', which meshes with and receives motion from a wheel, X, that is jonrnaled upon the arbor F. The wheel X has secured to its lower face, near its periphery, one end of a fine spring, or, that from thence extends spirally to the center, and has its inner end,which hasaV shape, in engagement with a pinion,f, that is secured to the arbor F.

The motion of the arbor F is communicated to the quarter-seconds train through the spring so, which thus acts as a maintaining-power, and also permits said train to be stopped, in which event the V-shaped engagingend ofsaid spring will slip from tooth to tooth of the pinion f without interference with the movement of the regular time-train. Said spring causes a forward pressure to be maintained upon said quarter-seconds train, so that each arm a of the pallet-wheel a will move forward as soon as released from engagement with a tooth, "v, of the escape-wheel V.

In order that the quarter-seconds hand may be instantly stopped without interference with the time-train, and to prevent movement of the arbor U while the pallet-arms a are moved out of engagement bythe teeth a, the pallet a is loosely journaled upon said arbor, and immediately above or below the former a fourarmed spider, a is rigidly attached to said arbor. One or more pins, a, secured within said pallet-arms, and operate as stops tolimit the movement of said pallet in either direction. W'hen the quarter-seconds train is in motion the pallet 'Lt', being driven, is held at the rear limit of the motion permitted by the stop-pins a; but when the arbor U has its motion arrested said pallet is moved forward by the escape-wheel V until the engaging arm Qt is out of contact with the teeth t When said quarter-seconds train is again started said pallet is caused to resume its former position, and will instantly engage again with said escape-wheel. The projecting end of the arbor U carries a hand, Y, that indicates quarterseconds upon a circle, 0 near the upper part of the dial 0, and the motion of said hand and arbor is arrested, when desired, by the following-described mechanism Pivoted at one end upon the plate A is a curved bar, Z, which is provided with a slender arm, 2, that projects from said pivoted end downward and toward the center of said plate, and at its end has an outward projection, a. Said bar is capable of being oscillated upon its pivotal bearing by means of a rod, A, which projects upward through the case, and by such oscillation to have the end z of said arm 2 brought into or removed from contact with one of the arms of the spider 20 The relative positions of said arm and spider are such as to cause the hand Y to be exactly above one of the quarter-seconds marks upon the dial each time that said parts are brought into contact.

As the sweep seconds-hand 1., while capable of being set, cannot have its motion arrested without stopping the time-train, an independent sweep seconds-hand, B, is desirable to adapt the cloclc to use as a timer.

The hand B is secured upon a sleeve or hub, 01:, that projects upward from the gear-wheel X, between the wheel R and the arbor F, said hub being slightly longer .than the former and shorter than the latter, so as to furnish room for the hand P outside of said hand 13. This arrangement causes said seconds-hand B to receive its motion from the supplemental train, and such motion to cease whenever the quarter'seconds arbor T is stopped.

In order that the seconds-hand B may be set, the sleeve m is connected with its wheel X by spring-friction, and upon said sleeve, above said wheel, is rigidly secured a second smaller wheel, 0, which is engaged by a similar wheel, D, that is secured upon the projecting end of an arbor, E, which is journaled within the plates A and B, with its rear end said incline and the plate A.

wheel D may not be moved by the supplemental train, said arbor is made longitudinally adjustable a sufficient distance to enable said wheel to be brought into or removed from engagement with the wheel 0, and by springpressure is held in such position as to prevent said wheels from having contact. To set said hand, said arbor is pulled to its rear limit by the button 6, and then rotated in the desired direction.

As the supplemental minutes-hand I is intended to operate only when the independent seconds-hand B and quarter-seconds hand Y are in motion, the pinion S is made movable lengthwise of the arbor E, such motion enabling it to move into or out of engagement with the wheel R, which movements are automatically eii'ected by the following-described means,

viz:

A spring-bar, F, is attached at one end to the upper portion of the plate A, and has its opposite forked end in engagement with a circumferential groove that is formed in the hub of the pinion S, the arrangement being such as to permit said pinion to rotate with its shaft with perfect freedom, while enabling said spring to control the position of said pinion lengthwise of said shaft. The spring is adjusted to hold the pinion S at the rear limit of its motion out of engagement with the wheel 1%, and upon its rear side is provided with an inclined face, f, which is engaged by the outer end of the stop-bar Z, which passes between When the stopbar Z is moved in the direction necessary for engagement with and stoppage of the quarterseconds train, it releases the spring-bar F and permits the same to withdraw the pinion S from engagement with the wheel It, thus instantly stopping the motion of the hand T, while upon reversing the motion of said bar Z said train is permitted to operate once more, and said pinion S and wheel R are again en- 'gaged, and said supplemental or independent minutes-hand T is again set in motion.

The entire movement is stopped, when desired b means ofabar G which is ivoted a 7 1 p at one end between the plates A and B, and at its other thinned end is doubled backward, as shown in Fig. 4. A rod, H, connected with said bar and from thence passing upward through the casing, enables the former to be moved upon its pivotal bearing until its outer end engages with and arrests the motion of the balance-wheel, or is removed from such engagement and said balance-wheel is left free to vibrate again.

Having thus fully set forth the nature and merits of my invention, what I claim as new 1s 1. A time-piece provided at the center of its dial with a constant and an independent sweep seconds-hand and an independent minutes-hand, and at points above and below such center having an independent quarter-seconds hand and constant minutes and hours hands, substantially as and for the purpose shown.

2. A time-piece provided with a sweep seconds-hand and a quarter-seconds hand, which are driven through a special train, which is connected with and driven by the regular train by means of a maintaining-spring, whereby said hands may be turned in either direction or stopped without interference with said regular train, substantially as and for the purpose set forth.

The combination of the arbor U, provided with the spider 40 the pallet a, loosely journaled upon said arbor, the stop-pins a and the pivoted bar Z, having the stop-arm 2, substantially as and for the purpose shown and described.

4. As a means for driving and arresting the motion of the independent minutes-hand T, the pinion S, attached to and made adjustable lengthwise of the arbor E, and adapted to be engaged with and be released from the wheel R, substantially as and for the purpose specitied.

5. In combination with the hub 01;, provided with the wheel C, the wheel D, secured upon the longitudinally-niovable journaled arbor E, and adapted to be moved into or out of engagement-with said wheel D by the longitudinal movement of said arbor, substantially as and for the purpose shown.

In testimony that I claim the foregoing I have hereunto set my hand this 23d day of August. 1882.

JACOB KARE. 

